Volume 49 Number 1 Article 7
Year 1995 Month 1
Title: Effect of Rootstock and Cultivar on the Growth and Precosity of Young Apple Trees
Authors: P.M. Hirst and D.C. Ferree
Abstract:
'Gala' and Triple Red Delicious' apple (Malus
domestica Borkh.) were grafted onto M.9EMLA,
MMJ06EMLA, MM.lll EMLA, and B.118
('Gala' only) rootstocks and grown in a green
house to determine the relative influence of
scion and rootstock on growth and flowering.
In addition, ungrafted micropropagated trees
of each cultivar, growing on their own roots,
were included.
Rootstock exerted more influence than cultivar on total growth, with micropropagated
trees making more total growth
than trees on clonal rootstocks.
The largest trees
had the most lateral branches, therefore rootstock
affected branching via a tree size influ
ence.
Branch density (branches per meter of
tree height) however, was primarily under cultivar control.
Rootstock affected flowering the
year after grafting, but not the subsequent year,
whereas in both years much more flowering
was observed on 'Gala' than on 'Delicious.'
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